[j-nsp] default route in forwarding-instance

[Nugroho WH Adisubrata]

Hi Noah,

When you are using FBF, the packet will be dropped if the next-hop is
unreachable i.e next-hop interface going down.

You can split up 0.0.0.0/0 routes become 2 subnets 0.0.0.0/1 and 128.0.0.0/1.
So you will need 3 static routes in the FBF instance, destination to
0.0.0.0/1 and 128.0.0.0/1 with same next-hop and static route to destination
to 0.0.0.0/0 with another next-hop for redundancy purposes.

Hope this would help.

Rgrds,
Nugroho


On Sat, Aug 15, 2009 at 3:15 AM, Admin <admin at enabled.com> wrote:

> Hi there,
>
> I am wondering how I can configure JUNOS to provide the proper forwarding
> that is necessary for an application I am working on.  I am matching source
> and destination in a firewall rule and placing specific matching packets in
> the FORWARD instance.  What if the next-hop no longer is usable I suppose
> the packets will be dropped.  How can I resort to the inet.0 table if 0/0 in
> the routing-instance becomes unusable?  I realize there is
> qualified-next-hop but that requires a next-hop IP and therefore reduces a
> more dynamic next-hop choice.
>
> Ideas?
>
>
> --- snip ---
>
> FORWARD {
>    instance-type forwarding;
>    routing-options {
>        static {
>            route 0.0.0.0/0 {
>                next-hop 192.168.0.1;
>                resolve;
>            }
>        }
>        maximum-prefixes 300;
>    }
> }
>
> --- snip ---
>
> Cheers,
>
> Noah
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